名词
中文翻译：观察效应浓度
同义词：
['observed effect concentration', 'observed effect threshold']
例句：
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1. The researchers found that the no observed effect concentration was too low to detect any meaningful changes in the brain activity.
研究人员发现，观察到的效应浓度太低，无法检测到任何有意义的大脑活动变化。
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2.In this study, we aimed to determine the no observed effect concentration for different exposure levels.
在这个研究中，我们的目标是确定不同暴露水平下的未观察到效应浓度。
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3.The no observed effect concentration is a critical parameter in determining the safe exposure level for a substance.
未观察到效应浓度是确定物质安全暴露水平的关键参数。